Paris vamp Ernestine Bergot, posing as wealthy Englishwoman Sarah Brandon, goes to work on aging Count Ville Handry after first warming up on Malgat, a banker whom she ruined. Ernestine convinces the count to marry her despite his daughter's strenuous objections and then gains complete control of his fortune. Her steady milking of his funds makes the count decide to kill himself, but just as he is about to do it, Malgat, who has managed to catch up with Ernestine, exposes her to the authorities....